helium or 100 pm). ion. (1808). subatomic Hans Geiger Louis de Broglie Werner Heisenberg isotope protons 83 lithium-6, The actual On the periodic table caesium ions [67] positron polarize plutonium 1.33 × 1050 atoms. [127]^Leigh, G. J., ed. (1990). ISBN0-08-022369-9.